<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>后盾人</title>
  </head>
  <body>
    <script>
      // const string = "99";
      // console.log(typeof string);
      // console.log(string * 1 + 78);
      // console.log(Number(string) + 88);

      // const number = 66;
      // console.log(typeof number);
      // const str = number + "";
      // console.log(typeof str);
      // console.log(typeof String(number));

      // const string = "99.78houdunren";
      // console.log(parseInt(string));

      // const cms = "hdcms";
      // console.log(cms.split("").length);
      // const array = ["hdcms", "houdunren"];
      // console.log(array.join("|"));

      // let str = "houdunren";
      // console.log(typeof str);
      // console.log(str.substr(3));

      // let cms = new String("hdcms");
      // console.log(typeof cms);
      // console.log(cms.substr(3));

      const array = ["hdcms", "houdunren"];
      console.log(array.toString());

      const number = 99;
      const newNumber = number.toString();
      console.log(newNumber + 78);
    </script>
  </body>
</html>
